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The effect of beta-adrenergic blockade in dilated cardiomyopathy — a questionnaire study in Japan

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Summary

The effect of beta-blockade in dilated cardiomyopathy was studied by a questionnaire survey. Thirty-three cases were monitored in whom metoprolol (22 patients, 35.9 ± 20.4 mg, mean ± SD), propranolol (four patients, 26.3 ± 7.5 mg), or other beta-blockers (seven patients) were administered. Four patients died, but no direct relationship was found between administration of beta-blocker and death. The NYHA functional class improved significantly. The mean heart rate decreased from 96/min to 77/min (P < 0.01). The mean cardiothoracic ratio decreased from 55.6% to 52.1% (P < 0.01). The mean ejection fraction of the left ventricle measured by echocardiogram increased from 30.4% to 36.9% (P < 0.01). Exercise tolerance in the treadmill test improved significantly. There was no change in blood pressure, nor were there arrhythmias seen on Holter electrocardiograms. In two patients, congestive heart failure deteriorated after administration of beta-blockers. It is concluded that beta-adrenergic blockade has a beneficial effect in most of the patients with dilated cardiomyopathy.

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This work was supported in part by a research grant from the Ministry of Health and Welfare and by a grant-in-aid for scientific research on priority areas and for general scientific research from the Ministry of Education, Science, and Culture, Japan, and Kanazawa Research Fund.

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Matsumori, A., Tominaga, M., Handa, S. et al. The effect of beta-adrenergic blockade in dilated cardiomyopathy — a questionnaire study in Japan. Heart Vessels 6 (Suppl 1), 6–10 (1991). https://doi.org/10.1007/BF01752530

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  • DOI: https://doi.org/10.1007/BF01752530

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